一种气化数学模型及木屑的高温气化试验

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1、中南大学硕士学位论文一种气化数学模型及木屑的高温气化试验姓名：林竹申请学位级别：硕士专业：热能工程指导教师：蒋绍坚20050401中南大学硕士学位论文ABSTRCTThisresearchhasbeenimplementedasoneofactivitiesofprojects“Researchonhi【ghtemperatureairgasificationforbiomass”(863scheme，No．2001AA514013)and“Researchonprocessofhilgh-temperat

2、uregasificationforMunicipalSolidWaste(MSW)”(investedbyZhuzhouTorchIndustrialFurnaceInc．，HunanProvince)．Tooptimizetheperformanceofsystemincludingthehigh-temperatureairgeneratorandhigh·temperaturegasifier,andtopromotethelevelofcollectingandutilizinglow-heatv

3、alueandlow-densityenergyfromMSW：biomassandlOW．heatvaluefuelinourcountry,anewmathematicmodelofgasificationhasbeenestablishedandhotgasificationtestshavebeencarriedout．Basedonmaterialbalance，energybalanceandchemicalequilibrium，themathematicmodelofgasification

4、hasbeenestablished．Themodelcallbeappliedtoallkindsofsolidfuel．Theeffectsofbiomassspecies，airtemperatureandfractionofsteaminthefeedgasongasificationhasbeenresearched．Theconclusionsareshownasbelow：>At900～1300℃．thehigh-heat—value(I-IHV)ofsyngasandgasification

5、efficiencyincreasewiththeincreaseofgasificationtemperature．Whenairtemperatureincreasesby100℃，theHHVofsyngasincreasesby0．25-0．32MJ／Nm’．Asthegasificationofpinesawdustasconcemed．theHHVofsyngasincreasesby22．41％whengasificationtemperaturerisesfrom900℃to1300℃and

6、reaches7．1MJ／Nm’at1300℃．>TheHHVofsyngasandgasificationefficiencyincreasewiththeincreaseoffractionofsteamintllefeedgas．Whenthefractionofsteaminthefeedgasincreasesby10％，theHHVofsyngasincreasesby0．46-0．53MI仓im’．Concerningthegasificationofpinesawdustatl100℃．wh

7、enthefractionofsteaminthefeedgasincreasesto60％．theHHVofsyngasincreasesby44．87％andiSclosetomiddleheatvalue．>Comparedwithhightemperatureairgasification，whentheII中南大学硕士学位论文ABSTRCToxygenisusedasgasifyingagentforgasifyingpinesawdustat1300。C．the唧Vofsyngasincreas

8、esby83．94％andreachesmiddleheatvalue．≯Themodelcanforecasttheresultsofgasificationreaction．Hotgasificationtestsforsawdusthavebeencompleted．Throughthenewmethodsofself-heating，thetemperatureinsidethegasifierCanqu